Comment by userbinator

and set the MAC address

Fun fact: a lot of the extremely cheap USB BT adapters you can find sold online have the same MAC address, probably because they couldn't be bothered to change it to something unique. Hence why things like https://macaddresschanger.com/ (Windows) and bdaddr (Linux) exist. Most of them seem to be clones of a CSR design, and the commands to set its address are well-known. (See https://sources.debian.org/src/bluez/5.55-3.1%2Bdeb11u1/tool... )